No Hot Water
Here’s What to Do Before You Call Mercy Plumbing
There’s nothing like stepping into the shower expecting soothing warmth and being met with icy cold water instead. When the hot water suddenly disappears, it throws your whole day off. At Mercy Plumbing, we understand how urgent this problem feels—especially when you have a family relying on daily hot showers, clean dishes, and warm laundry cycles.
If your home has unexpectedly lost hot water, don’t panic. There are a few steps you can take to troubleshoot the issue before calling in a professional. And if those don’t solve it, don’t worry—we’re always ready to help get your hot water back on.
First, Know What Kind of Water Heater You Have
Before you dive into diagnosing the problem, it helps to know what type of water heater you’re working with. Most homes in Katy, TX have either a gas, electric, or tankless water heater. Gas water heaters usually have a pilot light and a gas line, while electric water heaters are powered by your home’s electrical system. Tankless water heaters, which heat water on demand, often display error codes when something goes wrong. If you’re not sure which type you have, look for a label on the unit or check your utility bills for gas usage.
If you’d like to learn more about water heaters and what best fits your home, contact Mercy Plumbing today at (832) 876-9498.
What to Check When There’s No Hot Water
If you have a gas water heater, start by checking the pilot light. If it’s out, your water won’t heat up. Newer models might use electric ignition instead of a traditional flame. It’s also a good idea to make sure the thermostat is set properly—some units can reset themselves after power outages, and you may need to adjust the temperature back to a normal level.
Electric water heaters can sometimes trip a breaker, so take a look at your electrical panel. If the breaker is off, flip it back on and wait a bit to see if the water heats. Another common issue is a tripped high-limit switch on the heater itself, which can often be reset from the top panel. If you hear strange humming or silence when the system should be running, there might be a failed heating element inside.
For tankless systems, you’ll want to check for any error codes on the digital display. These units can shut down if they detect low gas pressure, frozen pipes, or internal malfunctions. Confirm that you have gas or electricity running to the unit and that nothing is blocking the water flow.
Discover what’s really going on in your water heater. Contact Mercy Plumbing at (832) 876-9498 today to schedule an appointment.
Could It Be Something Else?
Sometimes, the problem isn’t the water heater—it’s something else entirely. If only one faucet or shower isn’t producing hot water, the issue could be with that specific fixture. Clogged aerators, sediment buildup, or a faulty mixing valve can affect water temperature in a single location. If your water use has been unusually high—maybe everyone in the house just showered or the washing machine and dishwasher ran back-to-back—you may simply need to wait for the tank to refill and reheat. And if you recently lost power, some water heaters need to be reset manually afterward.
When to Call the Pros at Mercy Plumbing
If you’ve walked through all of these steps and still don’t have hot water, it’s time to give us a call. You could be facing a malfunctioning thermostat, a broken heating element, a faulty gas valve, or sediment buildup that’s reduced your heater’s efficiency. Water heaters, especially gas-powered ones, can be dangerous to tinker with if you’re not trained—and DIY fixes can lead to bigger problems if something goes wrong. Our licensed plumbers can quickly diagnose the issue and recommend the safest, most cost-effective solution.
Should You Repair or Replace Your Water Heater?
Every water heater has a lifespan. If yours is over 8 to 12 years old and you’re starting to experience recurring issues, it may be time to think about a replacement. Leaks around the base, strange popping or banging noises, rusty water, or rising energy bills can all be signs that your unit is nearing the end of its useful life. At Mercy Plumbing, we don’t believe in one-size-fits-all recommendations. We’ll assess your situation, explain your options clearly, and help you choose a solution that works for your home and budget—whether that’s a simple repair or a new energy-efficient system.
Why Homeowners in Katy, TX Trust Mercy Plumbing
Losing hot water is stressful, but choosing a plumber shouldn’t be. At Mercy Plumbing, we’re proud to serve Katy and the surrounding areas with honest service, experienced technicians, and a commitment to solving problems the right way. We offer same-day appointments when available, clear and upfront pricing, and long-lasting repairs that stand the test of time. Our team treats every home with respect and professionalism—because we know your time, comfort, and safety matter.
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